Items in a dropdown menu (HTML <select> tags) get rendered incorrectly when they're hovered. An item that's just been unhovered gets the blue background with white text that should be used for the hovered ited, while the hovered item itself is styled with white background and black text.

Dropdown menus are rendered in a popup, with generated HTML and a default CSS. See src\3rdparty\chromium\third_party\blink\renderer\core\html\forms\internal_popup_menu.cc, and src\3rdparty\chromium\third_party\blink\renderer\core\html\resources\html.css.

This only affects Windows, so it may be a CSS pseudo-class styling bug like QTBUG-137194